LTC1439IG#TRPBF

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The LTC1439IG#TRPBF is a DC/DC switching controller that belongs to the Linear Technology family of Voltage Regulators and is best suited for applications requiring precise control with low noise and fast switching capability. It is designed to be used either with a 2-phase or 3-phase topology, and with its integrated resistor network, it allows quick and easy setup of a wide range of output voltages.

Its integrated low current consumption of under 1µA makes it an ideal solution for battery powered applications such as cell phone chargers and portable equipment, where low current consumption is a key requirement. The LTC1439IG#TRPBF switching controller also features a precise voltage loop control which monitors the output voltage and corrects for any voltage drift.

The design of the LTC1439IG#TRPBF switching controller provides many advantages over traditional linear-based regulator designs. Firstly, its fast switching frequency provides greater efficiency and lower noise levels. Secondly, its control loop provides tight voltage control and eliminates cross-regulation effects, which are common in linear-based systems. Lastly, the integrated circuitry eliminates the need for external components such as voltage loop compensation, current-sense and totem-pole circuitry, making the design simpler and cost-effective.

The LTC1439IG#TRPBF’s features are attractive for many design applications, particularly for those requiring a direct current (DC) to DC conversion with precise voltage control, tight regulation and fast switching frequency. Its design enables power-saving applications such as those for cellular handsets, portable devices, PDA’s, and small-scale computers; all requiring a low ripple, low noise, and cost-effective power supply.

The LTC1439IG#TRPBF’s working principle lies in its integrated voltage loop control circuit. This circuit monitors the output voltage and adjusts the current and voltage limits in order to maintain a precise output voltage. To understand the working principle of the LTC1439IG#TRPBF, it is important to understand the block diagram of the unit. Firstly, the power supply is fed into the unit’s input, which is then regulated in the pre-regulation stage which removes any high levels of ripple present in the voltage. After regulation, the voltage passes through to the DC/DC converter, which boosts or buck the voltage according to the target output voltage. The voltage loop then monitors the output voltage and adjusts the current and voltage limits accordingly, to maintain the voltage level. Finally, an over-voltage shut-off circuit is employed to protect the system from over-voltage faults.

In conclusion, the LTC1439IG#TRPBF is a cost-effective, compact, and precise switching controller ideal for replacing a traditional linear-based regulator. Its features such as low current consumption and fast response time make it the perfect choice for applications requiring precise voltage control, efficient power saving and low noise levels. In addition, its easy-to-understand working principle ensures only minimal design effort is needed to implement it in your design.

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